5.9L 12V Performance Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps Related to Performance and Longevity

12v marine cam

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Old 12-09-2014, 12:07 PM
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Default 12v marine cam

Has anyone ran the 370hp marine cam in a truck application, it says it's good for towing and better spool up but I've heard one guy say it's only good if u stay over 3000 rpm a lot. Just looking for some opinions or personnel experience. Thanks
 
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Old 12-09-2014, 01:57 PM
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There are many better options out there for cam's if you want to do a swap. That 370hp marine cam falls pretty low on the list
 
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Old 12-09-2014, 02:31 PM
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marine engines are designed to run at like 2500 rpms all day and never shut off. is that what your after?
 
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Old 12-09-2014, 03:48 PM
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Get a 181/208 or whatever it is or a 188/220 cam from Hamilton or a similar company. 90% of actually useful cams are the same price. If you want a direct drop in the 181/208 or 210 it might be is a direct drop in to a stock truck. If you go any smaller you will end up like the tons of other people you see in forums who keep upgrading cams. Best to do it once. If you want all out performance the 188 is apparently the way to go. That what I have sitting at home waiting to be put in. Hoping it will spool a s464 quite quickly
 
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Old 12-09-2014, 04:46 PM
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i hate that i have been MIA for a few months and on my second post have to argue. LOL i absolutly do not agree with the above post. a camshaft is like any other modification to an engine. it works best with parts that complement it. the bigger you go with anything the worse its gonna act on the street. choose a hp goal then a turbo and then everything else that complements those two items. i make just over 550hp on a 62mm turbo a colt big stick cam, 5x14's with 20* timing and am still able to use the truck as a truck. im nearly on the ragged edge making that kind of hp on a s362 but it allows me to use the truck. a bigger turbo would make more power but suck more on the street. exact same thing with a camshaft. you go too big for your hp goal and you will dramatically loose drive pressure and overall drivability to achieve a few more ponies way way up top where you probably dont want them. a big cam typically means more overlap. no street driven engine gas or diesel with a turbo like lots of overlap. most people dont need a cam or only really need a mild cam. people tend to go nuts with the size of things turbo, injectors, camshaft, ect ect when thats not how you build a good running anything. spec your build out and purchase accordingly. i have a 181, a 188/220 would spool my 62mm charger roughly 200 rpms slower but increase power up into the 4k+ range instead of having the curve lower in the 3k's
 

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Old 12-10-2014, 12:50 AM
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Not really into arguing and considering I have no real
Cam experience yet but how could a cam designed to spool a turbo better reduce low end grunt when that's what it's designed for. Every power stroke is more effective thus giving more low boost power because less boost is needed to create same power as well as pushing more air so getting to desired boost is faster. I agree with matching parts but a 181 is sized for like a 60 mm which is a very small common reasonable upgrade. The 188 is more suited for a 62 and up. Any lower seems like a waste of time and money for a minor boost in efficiency when you could just get a 181 for a mild truck and a 188 if you have bigger plans.
 
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Old 12-10-2014, 03:53 AM
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because of the overlap. turbo engines of all types dont like excesive overlap down low. this is what you get into with big cams that open the doors for high hp. is lotso overlap. which makes everyday drivability suffer.
 
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Old 12-10-2014, 05:38 AM
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Just for comparison hamiltons 188/220 has -14.5* of overlap and your big stick cam 181/210 has -16.5* of valve overlap @.050".
 
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Old 12-10-2014, 07:31 AM
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Doesn't that make the 188 less over lap?
 
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Old 12-10-2014, 03:41 PM
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Originally Posted by turbo2332
marine engines are designed to run at like 2500 rpms all day and never shut off. is that what your after?
No that's not what I'm after at all and was kinda what I thought it was good for but everywhere that sells them says they r good for a tow cam so that would make them decent on the bottom end to me, I wish someone would chime in with personal experience.
 


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